Let's roll up our sleeves and solve this. We have 143 and we're going to multiply it by 5, essentially adding 143 to itself 5 times.
Step 1: 0 + 143 = 143
Step 2: 143 + 143 = 286
Step 3: 286 + 143 = 429
Step 4: 429 + 143 = 572
Step 5: 572 + 143 = 715

So, 143*5 = 715